Handling multiple API subdomains with Retrofit 2.0

Api.java

package com.example.api;

import java.util.Map;

import retrofit.Call;
import retrofit.http.Body;
import retrofit.http.GET;
import retrofit.http.POST;

public interface Api {

  @GET("action")
  Call getAction();


  @POST("action")
  Call postAction(@Body Map<String, Object> requestBody);
}

ApiClient.java

package com.example.api;

import com.squareup.okhttp.OkHttpClient;

import retrofit.GsonConverterFactory;
import retrofit.Retrofit;

public class ApiClient {
  public final PlacesApi placesApi;
  public final Api api;

  public ApiClient(OkHttpClient client) {
    final Retrofit.Builder retrofitBuilder = new Retrofit.Builder()
          .addConverterFactory(GsonConverterFactory.create())
          // Important to set a client on the build to prevent .build() from making new ones
          .client(client);
    api = retrofitBuilder.baseUrl("https://api.example.com").build().create(Api.class);
    placesApi = retrofitBuilder.baseUrl("https://places.example.com").build().create(PlacesApi.class);
  }
}

PlacesApi.java

package com.example.api;

import retrofit.Call;
import retrofit.http.GET;
import retrofit.http.Query;

public interface PlacesApi {

  @GET("places")
  Call getPlaceAutocomplete(@Query("query") String query);
}